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Forest plot of overall survival for subgroups in patients receiving the combination therapy of interventional treatment plus lenvatinib with or without PD-1 inhibitor. SI, biliary stenting implantation with iodine-125 seed strand; HAIC, hepatic artery infusion chemotherapy; ECOG, Eastern Cooperative Oncology Group; TNM, tumor node metastasis; CA199, carbohydrate antigen 199; PD-1, programmed death-1.
